American Journal of Physical Chemistry

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Adsorption of Hg2+ and Ni2+ from Aqueous Solutions Using Unmodified and Carboxymethylated Granular Activated Carbon (GAC)

Received: 22 October 2014    Accepted: 29 October 2014    Published: 02 December 2014
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Abstract

The use of unmodified and carboxymethylated granular activated carbon (GAC) for adsorption of Hg2+ and Ni2+ from aqueous solutions was assessed in this work. The effect of concentration and modification by carboxymethyl group on the adsorption of these metal ions was studied in batch process. The adsorption data were correlated with Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherm models. Results show that Freundlich model gave the best description for the adsorption process followed by the Langmuir model. Langmuir adsorption capacity corresponding to sites saturation was found to be 20.83 mg g-1 and 19.05 mg g-1 for adsorption of the Hg2+ and Ni2+ respectively onto the unmodified adsorbent and 19.72 mg g-1 and 17.01 mg g-1 for adsorption onto the carboxymethylated substrate. The apparent energy values obtained from the Dubinin-Radushvich model further indicates that the forces of the adsorption follow physical mode. Modification by carboxymethyl group generally caused a decline in the adsorption capacity by the adsorbent. Results obtained generally showed that Hg (II) ions were better adsorbed onto both adsorbents as compared to Nickel (II).

DOI 10.11648/j.ajpc.20140306.11
Published in American Journal of Physical Chemistry (Volume 3, Issue 6, December 2014)
Page(s) 89-95
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Adsorption, Granulated Activated Carbon, Heavy Metals, Isotherm Models, Metal Ions

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Author Information
  • Department of Chemistry, Michael Okpara University of Agriculture, Umudike, P.M.B 7267, Umuahia, Abia State Nigeria

  • Department of Chemistry/Biochemistry/Molecular Biology, Federal University, Ndufu-Alike Ikwo, Abakaliki, Ebonyi State, Nigeria

  • Department of Industrial Chemistry, Abia State University, P.M.B 2000 Uturu, Abia State Nigeria

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    Francis Kalu Onwu, Christopher Uchechukwu Sonde, Jude Chibuzo Igwe. (2014). Adsorption of Hg2+ and Ni2+ from Aqueous Solutions Using Unmodified and Carboxymethylated Granular Activated Carbon (GAC). American Journal of Physical Chemistry, 3(6), 89-95. https://doi.org/10.11648/j.ajpc.20140306.11

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    Francis Kalu Onwu; Christopher Uchechukwu Sonde; Jude Chibuzo Igwe. Adsorption of Hg2+ and Ni2+ from Aqueous Solutions Using Unmodified and Carboxymethylated Granular Activated Carbon (GAC). Am. J. Phys. Chem. 2014, 3(6), 89-95. doi: 10.11648/j.ajpc.20140306.11

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    AMA Style

    Francis Kalu Onwu, Christopher Uchechukwu Sonde, Jude Chibuzo Igwe. Adsorption of Hg2+ and Ni2+ from Aqueous Solutions Using Unmodified and Carboxymethylated Granular Activated Carbon (GAC). Am J Phys Chem. 2014;3(6):89-95. doi: 10.11648/j.ajpc.20140306.11

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  • @article{10.11648/j.ajpc.20140306.11,
      author = {Francis Kalu Onwu and Christopher Uchechukwu Sonde and Jude Chibuzo Igwe},
      title = {Adsorption of Hg2+ and Ni2+ from Aqueous Solutions Using Unmodified and Carboxymethylated Granular Activated Carbon (GAC)},
      journal = {American Journal of Physical Chemistry},
      volume = {3},
      number = {6},
      pages = {89-95},
      doi = {10.11648/j.ajpc.20140306.11},
      url = {https://doi.org/10.11648/j.ajpc.20140306.11},
      eprint = {https://download.sciencepg.com/pdf/10.11648.j.ajpc.20140306.11},
      abstract = {The use of unmodified and carboxymethylated granular activated carbon (GAC) for adsorption of Hg2+ and Ni2+ from aqueous solutions was assessed in this work. The effect of concentration and modification by carboxymethyl group on the adsorption of these metal ions was studied in batch process. The adsorption data were correlated with Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherm models. Results show that Freundlich model gave the best description for the adsorption process followed by the Langmuir model. Langmuir adsorption capacity corresponding to sites saturation was found to be 20.83 mg g-1 and 19.05 mg g-1 for adsorption of the Hg2+ and Ni2+ respectively onto the unmodified adsorbent and 19.72 mg g-1 and 17.01 mg g-1 for adsorption onto the carboxymethylated substrate. The apparent energy values obtained from the Dubinin-Radushvich model further indicates that the forces of the adsorption follow physical mode. Modification by carboxymethyl group generally caused a decline in the adsorption capacity by the adsorbent. Results obtained generally showed that Hg (II) ions were better adsorbed onto both adsorbents as compared to Nickel (II).},
     year = {2014}
    }
    

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  • TY  - JOUR
    T1  - Adsorption of Hg2+ and Ni2+ from Aqueous Solutions Using Unmodified and Carboxymethylated Granular Activated Carbon (GAC)
    AU  - Francis Kalu Onwu
    AU  - Christopher Uchechukwu Sonde
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    DO  - 10.11648/j.ajpc.20140306.11
    T2  - American Journal of Physical Chemistry
    JF  - American Journal of Physical Chemistry
    JO  - American Journal of Physical Chemistry
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    EP  - 95
    PB  - Science Publishing Group
    SN  - 2327-2449
    UR  - https://doi.org/10.11648/j.ajpc.20140306.11
    AB  - The use of unmodified and carboxymethylated granular activated carbon (GAC) for adsorption of Hg2+ and Ni2+ from aqueous solutions was assessed in this work. The effect of concentration and modification by carboxymethyl group on the adsorption of these metal ions was studied in batch process. The adsorption data were correlated with Langmuir, Freundlich, Dubinin-Radushkevich and Temkin isotherm models. Results show that Freundlich model gave the best description for the adsorption process followed by the Langmuir model. Langmuir adsorption capacity corresponding to sites saturation was found to be 20.83 mg g-1 and 19.05 mg g-1 for adsorption of the Hg2+ and Ni2+ respectively onto the unmodified adsorbent and 19.72 mg g-1 and 17.01 mg g-1 for adsorption onto the carboxymethylated substrate. The apparent energy values obtained from the Dubinin-Radushvich model further indicates that the forces of the adsorption follow physical mode. Modification by carboxymethyl group generally caused a decline in the adsorption capacity by the adsorbent. Results obtained generally showed that Hg (II) ions were better adsorbed onto both adsorbents as compared to Nickel (II).
    VL  - 3
    IS  - 6
    ER  - 

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